python 3.x - What is python3 equivalent of Date.now() of javascript? - Stack Overflow

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In JavaScript, I can assign:

var now = Date.now();

Then use now to calculate as a number variable

>>> import datetime
>>> datetime.datetime.now()
>>> datetime.datetime.today()

In python3, Using upper code doesnt seem helpful. Any idea what is equivalent of Date.now().

In JavaScript, I can assign:

var now = Date.now();

Then use now to calculate as a number variable

>>> import datetime
>>> datetime.datetime.now()
>>> datetime.datetime.today()

In python3, Using upper code doesnt seem helpful. Any idea what is equivalent of Date.now().

• javascript
• python-3.x
• date
• datetime
• time

Share Improve this question Follow edited Jul 10, 2021 at 17:57 Machinexa asked Oct 1, 2020 at 13:33 MachinexaMachinexa 59911 gold badge1010 silver badges2121 bronze badges 3

• 1 Start with datetime.datetime.now().timestamp(). See tutorialspoint./… – jarmod Commented Oct 1, 2020 at 13:37
• Duplicate of Get current time in milliseconds in Python? – trincot Commented Oct 1, 2020 at 13:50
• Oh didnt realize that – Machinexa Commented Oct 1, 2020 at 13:55

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2 Answers 2

Sorted by: Reset to default 8

You should use time module.

>>> import time
>>> int(time.time() * 1000) #for getting the millisecs

1601559393404

Date.now() returns the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC. The Python 3.3 and later equivalent is:

from datetime import datetime, timezone

now_ms = int(datetime.now(tz=timezone.utc).timestamp() * 1000)

Without tz=timezone.utc, datetime.timestamp will use a naive datetime, usually set to your local time with timezone, daylight savings time, etc. This can be a subtle source of bugs, when going from Python to Javascript, between development environments and production, or around daylight savings time transitions.

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